docs: def pretty_str(self, indent=0):
          """Return a human-readable string representation of this object.
  
          Kwargs:
              indent (int): The amount of spaces to use as indentation.
          """
          indent = ' ' * indent
          values = '{{{}}}'.format(', '.join(map(pretty_str, self.value)))
  
          if self.parenthesis:
              return '{}({})'.format(indent, values)
          return '{}{}'.format(indent, values)